Quantitative research of the liquid film characteristics in upward vertical gas, oil and water flows

The study of liquid film characteristics in multiphase flow is a very important research topic, however, the characteristics of the liquid film around Taylor bubble structure in gas, oil and water three-phase flow are not clear. In the present study, a novel liquid film sensor is applied to measure the distributed signals of the liquid film in three-phase flow. Based on the liquid film signals, the liquid film characteristics including the structural characteristics and the nonlinear dynamics characteristics in three-phase flows are investigated for the first time. The structural characteristics including the proportion, the appearance frequency and the thickness of the liquid film are obtained and the influences of the liquid and gas super-ficial velocities and the oil content on them are investigated. To investigate the nonlinear dynamics char-acteristics of the liquid film with the changing flow conditions, the entropy analysis is introduced to successfully uncover and quantify the dynamic complexity of the liquid film behavior.(c) 2022 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.

Automated summary

In this study, a novel liquid film sensor is used to investigate the characteristics of the liquid film around Taylor bubble structure in gas, oil, and water three-phase flow, including structural and nonlinear dynamics characteristics. The structural characteristics, such as proportion, appearance frequency, and thickness of the liquid film, are obtained, and the effects of liquid and gas superficial velocities and oil content on them are investigated. The entropy analysis is introduced to successfully uncover and quantify the dynamic complexity of the liquid film behavior.